In 1838-39, 2 German scientists Theodor Schwann and Matteos Schleiden formulated the basic principles of cellular theory:
1) Both plant and animal organisms are composed of cells.
2) Cells have a similar structure and perform similar functions.
But these scientists could not explain the mechanism of the formation of new cells. At the moment, much more is known about the cell. They talk about the mechanism of the formation of new cells in schools. It turns out that the modern student knows much more about the cell than the founding scientists of the cellular theory.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.